🔧 Tucson - Serpentine Belt Replacement

The serpentine belt drives accessories like the alternator, A/C compressor, and water pump pulley system on your Tucson. Replace it if it is cracked, glazed, squealing, frayed, or if the ribs are missing.

This is a good beginner repair, but belt routing matters. Take a picture before removal so the new belt goes on the same way.

Difficulty Level: Beginner | Estimated Time: 30-60 minutes

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⚠️ Safety & Precautions

• ⚠️ Work only with the engine off and fully cool.
• ⚠️ Keep fingers away from pulleys and the belt tensioner while releasing tension.
• ⚠️ Disconnect the negative battery cable to prevent accidental starting.
• ⚠️ If raising the vehicle, always support your Tucson with jack stands before reaching underneath.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 14mm socket
• 17mm socket
• 21mm socket
• 3/8-inch ratchet
• Long-handle serpentine belt tool (specialty)
• Torque wrench 10-100 ft-lbs
• Flat-blade screwdriver
• Trim clip removal tool
• Floor jack rated 2-ton minimum
• Jack stands rated 2-ton minimum
• Wheel chocks
• Flashlight
• Safety glasses
• Nitrile gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1

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📋 Before You Begin

• Park your Tucson on level ground.
• Set the parking brake and place the manual transmission in gear.
• Place wheel chocks behind the rear wheels.
• Open the hood and let the engine cool completely.
• A belt tensioner is a spring-loaded arm that keeps the serpentine belt tight.
• A pulley is a round wheel the belt wraps around to spin accessories.
• Take a clear photo of the belt routing before removing the old belt.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the Battery

• Use a 10mm socket to loosen the negative battery cable clamp.
• Move the cable aside so it cannot spring back onto the battery post.
• This prevents accidental cranking while your hands are near the belt.

Step 2: Access the Belt Area

• Use a flashlight to look down the passenger side of the engine bay.
• If you need more room, raise the front passenger side with a floor jack rated 2-ton minimum.
• Support your Tucson with jack stands rated 2-ton minimum.
• Use a 21mm socket to remove the passenger front wheel if needed.
• Use a trim clip removal tool, flat-blade screwdriver, and 10mm socket to remove the inner splash shield.

Step 3: Record the Belt Routing

• Use your phone to take a picture of how the belt wraps around each pulley.
• Compare the belt path to the belt routing decal under the hood if present.
• Make sure you can identify the smooth side and ribbed side of the belt.
• The ribbed side rides on grooved pulleys; the smooth side rides on smooth pulleys.
• Photo first, wrench second.

Step 4: Release Belt Tension

• Place a 14mm socket or 17mm socket on the automatic belt tensioner bolt head.
• Attach the long-handle serpentine belt tool or 3/8-inch ratchet.
• Rotate the tensioner slowly to relieve belt tension.
• While holding the tensioner, slide the belt off the easiest upper pulley.
• Slowly release the tensioner back to its resting position.
• Do not let the tensioner snap back.

Step 5: Remove the Old Belt

• Pull the belt off the remaining pulleys by hand.
• Guide the belt out through the engine bay or wheel-well opening.
• Use a flashlight to check that no pieces of old belt remain in the pulley grooves.

Step 6: Inspect the Pulleys and Tensioner

• Spin each accessible pulley by hand while wearing nitrile gloves.
• Each pulley should spin smoothly with no grinding, wobble, or rough noise.
• Use a flashlight to inspect the tensioner arm for crooked alignment.
• If the tensioner is weak, noisy, or crooked, replace it before installing the new belt.
• Noisy pulleys ruin new belts fast.

Step 7: Install the New Belt

• Route the new serpentine belt around the lower pulleys first.
• Follow your photo exactly.
• Keep the belt ribs fully seated in every grooved pulley.
• Leave the easiest smooth upper pulley for last.
• Use the 14mm socket or 17mm socket with the long-handle serpentine belt tool to rotate the tensioner again.
• Slide the belt over the final pulley.
• Slowly release the tensioner until it tightens the belt.

Step 8: Verify Belt Alignment

• Use a flashlight to inspect every pulley.
• Make sure the belt is centered and all ribs are sitting inside the pulley grooves.
• If the belt hangs off any pulley edge, use the 14mm socket or 17mm socket to release tension and reseat it.
• Do not start the engine until the belt is perfectly aligned.

Step 9: Reinstall the Splash Shield and Wheel

• Use the trim clip removal tool, flat-blade screwdriver, and 10mm socket to reinstall the passenger-side splash shield.
• Reinstall the passenger front wheel using a 21mm socket.
• Lower your Tucson from the jack stands rated 2-ton minimum using the floor jack rated 2-ton minimum.
• Use a torque wrench 10-100 ft-lbs and 21mm socket to tighten the wheel lug nuts in a star pattern.
• Torque to 88-107 Nm (65-79 ft-lbs).

Step 10: Reconnect the Battery and Test

• Use a 10mm socket to reconnect the negative battery cable.
• Start the engine and let it idle.
• Watch the belt for 30 seconds with a flashlight.
• The belt should run straight with no wobble, squeal, or flapping.
• Turn the A/C on and listen again for belt noise.

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✅ After Repair

• ✅ Shut the engine off and recheck belt alignment after the first test run.
• ✅ Take a short drive, then listen for squealing during startup and acceleration.
• ✅ If the belt squeals, inspect for misrouting, worn tensioner, oil contamination, or a seized pulley.
• ✅ Recheck the belt after a few days of driving to make sure it remains seated correctly.

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💰 DIY vs Shop Cost

Shop Cost: $120-$250 parts + labor

DIY Cost: $25-$60 parts only

You Save: $95-$190 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hour.

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🎯 Ready to get started?

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